TechNet Subscriptions launched 3 editions of Windows Server 2008 simultaneously with the Windows team’s RTM.

These downloads are available to TechNet subscribers worldwide:

• Windows Server 2008 Datacenter, Enterprise and Standard (x64) X86 is Coming Soon.
  Subscriber Downloads and Product Keys
• Windows Automated Installation Kit 1.1 (x86, x64, ia64)
  Subscriber Downloads and Product Keys
• Windows Server 2008 Multilingual User Interface Language Pack (x64)
  Subscriber Downloads and Product Keys